Build assembly files with AMBuild. (#481)

* Remove prebuilt nasm-generated object files from the tree, and use AMBuild to compile them.

* Add commands in VS project to build the object files

* Rename elf to elf32 for consistency

support/checkout-deps.sh

@@ -5,6 +5,22 @@ if [ ! -d "amxmodx" ]; then
   git clone --recursive https://github.com/alliedmodders/amxmodx.git
 fi
 
+if [ ! -d "amxmodx/build_deps" ]; then
+  mkdir amxmodx/build_deps
+fi
+
+download_archive ()
+{
+  if [ `command -v wget` ]; then
+    wget "$url" -O "$dest"
+  elif [ `command -v curl` ]; then
+    curl -o $dest $url
+  else
+    echo "Failed to locate wget or curl. Please install one of these programs."
+    exit 1
+  fi
+}
+
 if [ "$1" != "--no-mysql" ]; then
   ismac=0
   iswin=0
@@ -34,14 +50,9 @@ if [ "$1" != "--no-mysql" ]; then
   fi
 
   if [ ! -d "mysql-5.5" ]; then
-    if [ `command -v wget` ]; then
-      wget $mysqlurl -O mysql.$archive_ext
-    elif [ `command -v curl` ]; then
-      curl -o mysql.$archive_ext $mysqlurl
-    else
-      echo "Failed to locate wget or curl. Install one of these programs to download MySQL."
-      exit 1
-    fi
+    url=$mysqlurl
+    dest=mysql.$archive_ext
+    download_archive
     $decomp mysql.$archive_ext
     mv $mysqlver mysql-5.5
     rm mysql.$archive_ext
@@ -95,3 +106,15 @@ if [ $? -eq 1 ]; then
     python setup.py install --user
   fi
 fi
+
+if [ $iswin -eq 1 ]; then
+  if [ ! -d "amxmodx/build_deps/nasm-2.13.03" ]; then
+    url=http://www.nasm.us/pub/nasm/releasebuilds/2.13.03/win32/nasm-2.13.03-win32.zip
+    dest=amxmodx/build_deps/nasm-2.13.03-win32.zip
+    download_archive
+    cd amxmodx/build_deps
+    unzip nasm-2.13.03-win32.zip
+    rm nasm-2.13.03-win32.zip
+    mv nasm-2.13.03 nasm
+  fi
+fi